Manchester City manager Roberto Mancini has slammed midfielder Samir Nasri for only playing at 50% of his capabilities this season.
The former Arsenal playmaker was one of City's key players during their successful campaign in 2011/2012, but has failed to consistently perform since lifting the Premier League title.
Mancini believes that the Frenchman is resting on his laurels and is half the player he was last season.
"Samir can do better than this year," Mancini said.
"He is a top player, but he has not been playing at his level.
"Samir has fantastic qualities. He should always play well. A player of this quality could be one of the best in Europe. But it's not happening.
"If you are a top player, you know you can improve until the last day of your career.
"But sometimes you get players who think it is not important to work and this is their worst mistake.
"You win the title, you think it's enough to play 50 per cent and you don't arrive the next year."
Mancini also confirmed his interest in signing Edinson Cavani, Falcao and Liverpool striker Luis Suarez.
"I like (Cavani) but all the world wants him," Mancini added. "There are big players. I don't know what can happen.
"Suarez plays for a top team like Liverpool. Cavani plays for Napoli. There's Falcao but, again, all the managers like him."